Two outer-suburban councils are challenging the future of Victoria's biggest landfill site in an upcoming legal case. The councils claim an expansion approved by the State Government hasn't given enough consideration to the impact on local communities.

The only underground nuclear waste repository in the US doesn't have enough space for radioactive tools, clothing and other debris left over from decades of bomb-making and research, much less tons of weapons-grade plutonium that the nation has agreed to eliminate as part of a pact with Russia, federal auditors say.

Power giant AGL ceases installations of household batteries in Adelaide as part of a Virtual Power Plant trial and is flagging a change of battery technology. But it won't confirm if it is experiencing problems with its current product.

The discovery of potentially toxic PFAS chemicals linked to firefighting foams in soil near Darwin Airport delays the construction of a multi-million dollar retention pond designed to prevent flooding.